US Bridges

Or 203 (hwy 340) over Big Creek

Fair

Baker County, Oregon · 0.7 Mi. S. Union CO Line · Structure no. 02891A340 02358

Built
1976
49 years old
Condition
Fair
inspected September 2023
Type
Slab
Prestressed Concrete
Length
29 ft
1 main span
Daily traffic
151
2022 count
Owner
State
State Highway Agency

About this bridge

Or 203 (hwy 340) over Big Creek is a prestressed concrete slab carrying Or 203 (hwy 340) over Big Creek in Baker County, Oregon. It was built in 1976, so it is 49 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 151 vehicles a day, roughly 19% of them trucks, projected to reach 160 by 2042. The structure is 29 ft (8.8 m) long and 36 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

Open in Google Maps
CarriesOr 203 (hwy 340)
CrossesBig Creek
Location0.7 Mi. S. Union CO Line
RouteState Highway 203
CountyBaker County
StateOregon
Coordinates44.9831, -117.6539
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width36 ft (10.9 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic151 (2022)
Projected traffic160 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Or 203 (hwy 340) over Big Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Or 203 (hwy 340) over Big Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does Or 203 (hwy 340) over Big Creek carry?

About 151 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is Or 203 (hwy 340) over Big Creek?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 36 ft wide.

Who owns Or 203 (hwy 340) over Big Creek?

It is owned by the State Highway Agency.